Pinout: B1 Games: Choplifter, My hero, Pitfall, Regulus, Wonderboy. PCB Pinout Parts Side/Solder Side ------------------------------------------------------------- Ground | 1 | A | Ground ------------------------------------------------------------ Ground | 2 | B | Ground ------------------------------------------------------------- +5 Volts | 3 | C | +5 Volts ------------------------------------------------------------- +5 Volts | 4 | D | +5 Volts ------------------------------------------------------------- Coin Meter 1 | 5 | E | Coin Meter 2 ------------------------------------------------------------- +12 Volts | 6 | F | +12 Volts ------------------------------------------------------------- | 7 | H | ------------------------------------------------------------- 1P Button B | 8 | J | 2P Button B ------------------------------------------------------------- 1P Button A | 9 | K | 1P Button A ------------------------------------------------------------- | 10 | L | ------------------------------------------------------------- 1P Down | 11 | M | 2P Down ------------------------------------------------------------- 1P Up | 12 | N | 2P Up ------------------------------------------------------------- 1P Right | 13 | P | 2P Right ------------------------------------------------------------- 1P Left | 14 | R | 2P Left ------------------------------------------------------------- Coin 1 | 15 | S | 1P Start ------------------------------------------------------------- Coin 2 | 16 | T | 2P Start ------------------------------------------------------------- Test | 17 | U | ------------------------------------------------------------- Service | 18 | V | ------------------------------------------------------------- Speaker + | 19 | W | Speaker _ ------------------------------------------------------------- TV Red | 20 | X | TV Green ------------------------------------------------------------- TV Blue | 21 | Y | TV Sync ------------------------------------------------------------- TV Ground | 22 | Z | Ground -------------------------------------------------------------